Excretion is carried out through the structure labelled

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Which of the following structures is responsible for osmoregulation?

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Water rises most rapidly in

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The conservation of natural resources can be achieved by the following except

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Water in the human body is derived from the following sources except through

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Which of the following processes are involved in a water cycle?

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Which of the following processes is not involved in the carbon cycle?

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Changes in energy flow between organisms in a habitat can be represented by a

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Which of the following types of soil has the highest water-retaining capacity?

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Which of the following factors is not associated with aquatic habitat?

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Which of the following is not a way of reducing air pollution?

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Which of the following is an autotrophic mode of nutrition?

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